Apparatus for directed wireless telegraphy and telephony.



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E. BELLINI.

APPARATUS FOR DIRECTED WIRELESS TELEGRAPHY AND TELEPHONY.

' APPLICATION HLED o c.19. 1916.

1,297,31 3. Patented Mar. 18, 1919.

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APEPAETUS FOR. DIRECTED WIRELESS TELEGRAPHY AND TELEPHONY.

Original application filed June 19, 1915,

To all whom z't may concern:

Be it known that I, Efrronn BELLINI, subject of the King of Italy, residing at 41Ms Boulevard Cotte Enghien les Bains, Seine and Oise, in the epublic of France, have invented new and useful Improvements in Apparatus for Directed Wireless Telegraphy and Telephony, of which the following is a specification.

i The present application is a division of my co-pending application for Letters Patent Serial No. 35103 filed on the 19th June, 1915; and patented April 3, 1917, No. 1,221-,7 87. f

The-invention forming part of this appliy cation has for its object to provide wireless telegraph and telephone apparatus which allows, in regard to transmission, of controlling the direction of maximum projection of electromagnetic Waves, without turning the antennae, and in regard to reception of making adjustment for reception from selected directions. and ascertainlng the direction of the transmitting station also without moving the antennae.

The apparatus essentially comprises pairs of fixed conductive plates arranged around an axis, diametrically opposite each other, the number of pairs being equal to the number of aerials for directed Waves, and the two' opposed platesof each pair being connected to one of the aerials. Opposite the fixed conductive plates are arranged rotatable conductive plates directly or indirectly connected to highfrequency apparatus such as a sparking device, an are, an alternator, or a detector. These rotatable plates are mechanic'lly connected to each other, and can ,f be rotated about the axis of the fixed' system,

' tion shown in so that they can be placed opposite the two lates of any of the fixed pairs, or'in any intermediate position. The fixed conductive plates and the movable conductive plates a're arrangedl in co-axial cylinders, a short dis-` tance apart. The fixed or the movable plates are preferably gi-yen special shapes, as will' be described herelnafter.

The invention is illustratedin the annezied;

drawings, given as an exa-mple.

Figure'l shows one form of construction of the apparatus, i Figs. 2 and 3 showtwo kinds of movable plates which earn be used with-the construcig. 1. Fig. 4 shows a perspective view of the ap- Specification of Letters Patent.

Patentea Mar/misle.

Serial No. 85,103. Divide and' this application flled October 19, 1916. Serial R'o 126,582.

paratus, the front fixed plate thereof being in part broken away in order to show the inside.

The apparatus shown in F ig.1 comprises two pairs of conductive metal plates a, a, b, bkarranged upon a cylindrical surface, the plates belonging to each pair being diametrically opposite each other. -These plates are in the form of rectangles and almost entirely cover the cylindrical surface; between them is left only sufficient space for insulation. The two diametrically opposed sectors a a are connected to an aerial 1 for directed Waves, and the two sectors b b are connected to a similar aerial 2 perpendicular to the aerial 1. formed in the well known manner, either by a couple of vertical antennae, or by a frame, or by any type of directed Wave aerial which radiates and receives with the maximum intensity in its own plane.

Inside or outside the cylinder formed by the fixed plates a a b b, there is a rotary system consisting of two plates o, mechanically connected together, but insulated from each other. These plates may have any form whatever but -it is preferable to give them a form which, when extended inv a plane, has an outline formed by twosinusoidal curves (Fig. 2) or by the portion of the inclosed surface situated above the axis of the abscissae s-'-t. The two plates o must not touch each other, but must be very close together. G, H, I, J, (Fig. 2) designates the approximateoutline of the four sectors a a, b b ofthe fixed system developed in plan. -this figure represents the development of the projections of the outer sectors on the cylin- Fig. 4: represents Va perspective view of' the apparatus, the front fixed plate thereof being in art broken awayfin order to show Each of these aerials may be` eoV For greater clearness, however, i

the interior ofthe apparatus. 1, 1 and 2, 2

are two -directive' aerials placed at right angles and respectively connected to the fixed plates a, a and b, b. The movable plates o, a ai'e fiedto the insulatinug drum 60, or genera'lly speaking n aerials at .n v

the number of pairs of fixed sectors varying accordingly. The movable system of the apparatus is connected in the well known manner to the oscillation genera-ting or utilizing apparatus. Fig. 1 shows the movable plates connected to an oscill'ation generating circuit comprising a condenser d, an induction coil i, and a spark gap. A plurality of systems of fixed and movable plates may be superposed or arranged concentrically, in order to increase the capacity of the apparatus.

Having now described my invention, What I claim as newand desire to secure by Letters Patent is:

1. An apparatus for wireless telegraphy or telephony, comprising in combination aerials for the rception or transmission of vdlrected Waves, fixe`d conductive plates arranged about an axis, so as to lie upon a cylindrical surface diametrica-lly opposite each other in pairs, the number of pairs being equal to the number` of directed aerials, and the two plates of each pair being connected to one of the aerials, a rotary system of conductive plates mechanically connected together bent so as to lie upon a cylindrical surface coaxial to that of fixed plates and adapted to rotate aboutthe aXis common to the two Cylinders, and a high frequency apparatus, to which the rotary system of conductive plates is connected substantially as described and for the purpose set forth.

2. An apparatus for wireless telegraphy I or telephony comprising i-n combination aeri-als for the reception or transmission of directed Waves, fixed conductlve plates arranged to lie upon a cylindrical surface, diametrically opposite each other in pairs, the number of pairs being equal to the number of directed aerials, and the'tWo plates of each pa-ir being connected to one of the aerials, a rotary system of conductive plates mechanically conn'ected together bent so as to lie upon a cylindrical surface coaxi'al to that of the fixed plates, and adapted to rotate about the axis common to the two cyl-inders, said rotary plates having an Outline given by two sinusoid-al curves of opposite phases, and a high frequency apparatus, to which the rotary system of condu-ctive plates is connected, substantially as described and for the purpose set forth.

8. An apparatus for wireless telegraphy or telephony, comprising in combination aerials for the reception or transmission of directed Waves, fixed conductive plates arranged to lie upon a' c-ylindrical surface, diametrically opposite each other, in pairs, the number of pairs being equal to the number of directed aerials and the two plates of each pair being connected to one of the aerials, a rotary system of conductive plates mechanically connected together bent so as to lie upon a cylindrical surface coaxiflal to that 

